Charles



1 (No Moae1.) l' I 0. C. MAC CONNELL. M A' UAB, VBNTILATOR AND DUST ARRESTBR- No. 252,390. Patented Jan. 17,1882.

' To all whom tt may concern:

UNITED 'STATES PATENT OFFICE.

CHARLES o. MAeooNNELL, UNITED `sTArEs ARMY.

CAR-VENTILATR AND DUST-ARRESTER.

y SPECIFICATION forming part of Letters Patent No.' 252,390,dated January 17,-18E2.

` l l Application filed October 15, 1881. (No model.) 1

Be it known that I, CHAaLEs C. MAoCoN- 'Y NELL, Captain Fifth Artillery, U. S. A., stationed at Atlanta, Georgia, have invented or Idiscovered a new and useful Improvement in Car-Ventilators and Dust-Arresters; and Ido hereby declare the following to he a tull, clear,

l concise, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which-like letters indicating like partsl Figure 1 is a perspective view of my improved car-ventilator and dust-arrester, showing the same applied to a'car as in use. Fig. 2 shows the same by an enlarged view in sectional elevation. Fig. 3 is a view in elevation ofthe inner edge of the ventilator and of a part of the window-frame, showing the ventilator in position parallel with the side of theear for` removal or putting in place; and Figt isa view in elevation, showing the ventilator secured in` working position, part ot' the ventilator and window-frame being broken away to expose the staple or eye and key.

In the running of railwayfcars strong cur-- rents of air are created close to and along the sides of the cars toward the rear, and upon raising windows on either side such currents pass into the car, principally at the forward edge ofthe open window, at a comparatively sharp angle with or slight inclination from the direction ot'the cars motion. The strength of such currents is considerable, and they tend strongly to carrywith them dust from the roadbed and smoke and cinders from the locomotive to such extent as often to render the ventilation ofcars by open windowsimpractieable. Boards, blinds, or shieldsofvariousformsjhave been used on the frontedge of car-windows for arresting such dust and dirt, but in so doing the air is also to a large extent prevented from entering the window, and consequently thedesired ventilation or amount of fresh air is but partially secured.4

The purpose of my invention is to permit en trance into the car of agreate'r or less amount of such currents of air, as may be desired, and at the same time arrest or prevent the entry of dust, ciuders, &c., whereby the desired amount of air can be secured comparatively' `pure and free from dirt.

My improved device is constructed as l'ollows:

l A box, A, is made of wood or other suitable box, more or less. This partition a is placed, n bypreference, about one-third the wid th of the box from its inner edge, a. ofthis inner edge, a', is cut out, leaving an opening, a2, from the top V of the box down- The upper part ward-say. from one-halt to twothrds the length of the box-stopping short of or above the lower end of partitioh u, however, forming thereby a passage, e, between a and a', which serves as an uptake flue or airpassage, leading to the main discharge-opeuinga?. On

the other side of partitiouct, toward the outer edge of' the box, is made an opening, B,'in the front sideof the box, which opening is-eovered with a screen, b, of tine wire-gauze. The size and form ot' this opening B may be varied, asy

desired, with reference to admitting the desired amount of air. The screen is employed to arrest dust, cinders, Ste., and willto a large extent effect this object, though more or less tine dust will ofte-n pass through it with a strong current of air. o

In order to Vseparate such dust as may pass the screen, I carry the partition a below the openings B and a2, as shown in Fig. 2, and also provide one or more small openings, c, in the bottom ofthe box. Then as air enters through the `screen it will take a down ward course, dipping under partition a., an'd then rise through passage c and phssthrough opening a2 into the car. In so doing, however, a part Vol" the air will find escape through the bottom opening, c, and will carry with it all or the greater part of the dust which may come into the box, such dust being separated from the main current of air by the force of gravity, assisted by the n10- mentum secured by the downward course of the intlow'ing air and by the upward course to the discharge. It is obvious, however, that a material part of the advantages described may be secured even when the opening B-extends IOO g I l 25T-2,390

Y below partition a, since even in that case the *i* principal part of iniiowing air must take a downwardcourse toward the dust-outlet c in order to pass under the partition.

In order to regulate the supply of air, any suitable form of valve-as, for example, aslidevalve, e-may be arranged to open and close the passage e, as may be desired, or an equivalent valve device maybe placed at some other conro venient pointin the air-passage between the inlet and outlet.

I have shown the bottom a3 of the box inclined downward, corresponding with the slope ofthe window-sill s. This is done partly to secure a better rest on the sill and partly to give an incline to the bottom toward the opening c, and prevent accumulation of' dust on the bottom. Such a 4Ventilating-box may be secured in place in vaiio'us ways. The means shown zo consists of an open hook-and-eye hinge, i" i',

Figs. 1, 3, and 4, secured to the box and window-ease S in the usual way of setting such hinges, whereby the box may be raised ott' or put in place at pleasure by turning it against the side ot the car, as illustrated in Fig. 3. In A order to hold the box at iight angles to the side ofthe ca-r, an eye, 1^', may be set in the windowframe, which protludes through a slit, r2, in the side of the box. A key, r3, binds the box in 3o place, preventingit from swingingon its hinges r. Any other convenient mode of.fastening the box may be employed, however.

Theposition ofthe box or ventilator is against the side of the window in the direction ofthe cars motion, and it may be placed outside of the window-sash C, as shown, and designed for use when the window is raised 5 or it may be titted-in or against the window-frame in any .convenient way so as to open into the car at 4o the side of the window whether it be lup or down. 'This latter adaptationfis very desirable, especially in sleepers, enabling a passenger to obtain any desired supply of fresh air without raising the window.

When it is desired to reverse the direction of motion ofthe earfor a regular run the ventilators may be shifted from side to side of the Y 2. In an inclosed ventilator adapted for use in a car-window. the combination ot' a screenprotected' air-intlet, an air-passage leading therefrom downward within the ventilator, a dust-escape opening in the line of downward flow of air, and an air-passage leading from the inflow-passage upward to the air outlet or discharge, substantially as and for the purposes set fort-h.

f 3. In a ventilating-box, A, the combination of screen-covered inlet B, dust-outlet c, an inflow air-passage leading downward from inlet B to outlet o, an air-passage, e, leading upward from the inow-passage to a main air-outlet, and means foropening and closing the air passage between the `inlet and outlet, substantially as set forth.

In testimony' whereof I have hereunto set my h'and.

CHARLES G. MACGON-NELL.

Witnesses: C. L. PARKER, G. M. GORMLY. 

